That pretty much sums it up. I'm using Matlab R2017a. I want to analyze a filter I created. I didn't save the fda file but I have a Xilinx coe file that I have used to create FIR filters in Xilinx, so I know the syntax is correct. I opened filter designer and from the file menu pull down tried "Import filter from XILINX coefficient (COE) file. Nothing happened. No filter was imported, no error messages, filter designer still says READY.